Drier



K. LADISCH. DRIER.- APPLICATION' FILED IAUG. 15| T4921.

Patented May 23,. w22

2 SHEETS-SHEFT l.

um. Mu Mw WM K. LADISCH.

DRIER.

APPLICAUON FILED AUG.I5.1921.

Patented ay 23, 1922..

2 SHEETS-SHEET 2.

. n e: anreisen, or ainissrai, ennaianr.

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l .application mea august i5, iaai. serial its. esame.

To aZZwtowt it may concer/rt.'

' Be it lmown that ll, KARL Lanlscii, a

' citizen of the German Reublic, residing at 3 llfuisenplatz, Meissen, ermany, have invented certain new and useful Improvements in Diners; and l do'hereby declare thefollowing to be. a full., clear, and exact description of the invention, such as will enable othersv skilled in the art to which it fao appertains to malte and use the same, (for which applications have been filed in Germany January 27,1916; France A ril 12, 1920; lltaly April 13, 1920; Czecholovalnia December 13, 1919, and "Poland February 27, 1920,) reference being had to the accom panying drawings, and to letters or figures of reference marked thereon, which formv a art of this specification. lily' invention relates to driers for sliced vegetables, such as turnips, beets, potatoes, and other materials to be dried. v

The invention comprises a heating drum 'haringen its outside blades inclined to `the vaxis of the drum,'said drum having perfora `tions through which the hot air or drying gases pass,

lied to the interior of the drum at one end.

the drying medium beling`suphe drying medium passes through the perforations in the. drum, and dries the material that is' gradually forwarded from the, to the opposite dissupply end ofthe drum charge end thereof. l y

lln order to distribute the ldryin medium, hotair or furnace gases, so vthat t ere shall be supplied a greater quantity at that end `of the drum that received the fresh material -to be dried than at that portion having the material which has been partially dried and' forwarded but part way to the discharge' end, the drum is provided with an internal distributer tube, comprising connected sections adjustablyjspaced apart: 'llhis tube is so made-that the spaces between the sections pro ressively increase in. width from the discharge end to the lfeed end. .The space between this tubeandthe interior wall of the heating drum isdivided by annularpartitions into a plurality ofchambers.-

lltejferrin parte are similarly 'designated---4 Figure 1 is a vertical longitudinal section of the drying device. v

Fig. 2 is a cross-section, and lllig..4 3 isa detail view of one of the devices for adjusting the spaces between the tube Specincation of Lettersratent.

.forations l() for the v are forme to tliedrawingslv in which like "retest-ed may aa, ieee.

Fig. d is a detail view of a modification. he drier comprises a stationary casing f having an inlet g' for the material to be dried, a discharge opening e for the dried g materiahand an exhaust fm, for connection,`

The

are supported on rollers 't' on frame members4 8 of the' drier.

rllheI drum c or rather that portion included between the end walls 3 and 4i, is provided on its-'exterior with a well-known arrangement of forwarding blades 9, inclined to the axis -of the drum, the arrangement being such .as to forward the material graduall from the inlet end to the discharge .end (left to right).

rllhat portion of the the end walls 3 and 4l is provided with perfurnace gases.

rl`he drying medium, hot air or furnace gases, is supplied tothe drum through a stationary inlet pipe p the end of which enters 2, Fig. 2, and

drum c lying between passage of hot air or a dange 11 on the dange 6.' This flange 11 covers the joint between 'said pipe and a distributing pipe composed of spacedsec- `ticnsa---e8 so connected together that there are formed between the adjacent. sections spaces b-b8 increasing in width from the' discharge end to the linlet end of the drum.

' '.lhe sections are connected together in i spaced relation by straps-13 and are supportv width; the arrangement of the partitioned d?, d bei `suclithat the chambers tal-fet -able type' or as hereinbefore described, so

that the spaces b-b8 may be adjusted in loo between the' distributing :win v and the heating dimm, and the spaces are so arranged in progressively increasing l'widths that the chamber cB receives the greatest quantity of thedrying medium.

'lhe adjustment ofthe width ofthe spaces.

bmb can be etl'ected, as shown in Fi 3, by screw bolts 20, rotatabl, .arrange in bearings 21 of onesection an enga 'ng into nuts 23, faned tothe neat mction. By

I- turning these screws the sections can be adchambers e-e4 and thereby controlling the quantity of drying medium supplied through the perforations 10 to the material on the drum, according' to Athe rate of drying, 'for particular material, or according to the distribution of the dryino medium desired.

Instead of spaces, the distributing drum may bev provided with perorations r as' shown in Fie". s arranged in circular rows spaced apart the same as the spaces shown. These per'torationscan be closed more or less by dempers or slides s, which can slide on the drum and can be moved by rods t provided with screws u, engaging anges lv of the dempers a.,

The end of the last distributer section as is provided with a valve lc which can be moved back and'forth' by a hand wheel on a rod l mounted in the head -h closing the end .of the drum. p

In order to cool the entrance end of the heating drum c, where the'wet raw material is fed, the head his provided with openings z controlled by doors or dempers r of any construction desired, so that the cool outside air may be admitted to prevent the sticking of the materialfor cooking of the starch con- -tained in it. When the valve lc is withdrawn from theend of section-a?, cooll air coming through the head ofthe drum is admitted to the distributer tube as well as to the chamberv` 'e4 through `the space between the last distributersection as and the heatin drum c. The valve k when moved inwar controls the amount of dryin medium admitted to chamber/e4, while t e dampers or slides r controlling the openings regulate the amount of cold air admitted to the chamberorv to the perforations between the partition d and wall 3, whereby the dr ing in the initial stage takesplace wit out hquefying. or caramelizing the starch in the .substances being dried,l after which hotter gases act upon the material Without changmg the starch content, to rapidly complete 'the drying.-

The drum and tube are rotated by a driven pinion o gearing with a circular rack n on the drum.

I claim: l. In a drier, a rotatable perforated heat in drum, in combination with a distributer tu e within said drum and spaced from the .walls 'thereof said tube having spaced openings therein increasing in size from the discharge end to the-inlet end ot saiddrum.

2. In a. drier, a rotatable perforated heating drum7 in combination with a distributer tube within said drum and spaced from the walls thereof, said tube having spaced openings therein increasing in size'rom the discharge end to the inlet end oiE said drum, and means for adjusting the size ot the openings in the distributer tube. 3. In a drier, a rotatable perforated heating drum, in combination with a concentric distributer tube therein spaced from said drum, said tube composed of a number of' spaced sections, and means to adjustably secure the sections together to vary the width of said spaces.

4. In a drier, a rotatable perforated heating drum, in combination with a concentric distributer tube therein spaced froml said drum, said tube composed of a number of spaced sections, and means to adjustably secure the sections together to vary the width of said spaces,'and annular partitions dividing the spacebetween said drum and tube into separate A'chambers receiving drying medium from one or more spaces between sections of said tube.

5. In a drier,fa rotatable perforated heating drum, in combination with a concentric distributer tube within said drum and spaced therefrom, annular partitions dividing the space between said tube and drum into separate chambers, said tube having one or more openings discharging into each chamber and the openings increasln in size from the discharge end to the in et end, a valve controlling the end of said tube and means to my inventioml have signed my name.

KARL LADISCH. 

